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DistributionAtlantic, Indian and Pacific Oceans. Body extremely elongate and slightly depressed. Snout prolonged and tubular, without barbles. Scaleless or with tiny prickles and rows of scutes. Dorsal or anal spines absent. Dorsal soft rays 13-20. Anal soft rays 13-20. Forked cadual fin. Caudal filament formed by 2 center rays. Anus close to pelvic fins. Well developed lateral line; anterior portion arched to almost mid-dorsal and extending onto caudal filament. Abdominal vertebrae with two lateral extensions, becoming reduced posteriorly. Vertebrae 76-87. Maximum length recorded 1.8 m. Feed on other fishes in open water and also in coral reefs to which their tubular snout is adapted.